I/O Structure
Figure 2–67. Arria GX IOE Structure
Logic Array
OE Register
D
Q
OE
OE Register
D
Q
Output Register
D
Q
Output A
Output B
CLK
Output Register
D
Q
Input Register
D
Q
Input A
Input B
Input Latch
Input Register
D
Q
D
Q
ENA
The IOEs are located in I/O blocks around the periphery of the Arria GX
device. There are up to four IOEs per row I/O block and four IOEs per
column I/O block. Row I/O blocks drive row, column, or direct link
interconnects. Column I/O blocks drive column interconnects.
2–102
Arria GX Device Handbook, Volume 1
Altera Corporation
May 2008